Lemire has a great device in this issue–lots of small panels full of conversation to show a rapid-fire exchange. Not sure if it's his own creation but it's a wonderful tool for pacing the reader while still having visually dynamic panels. They're just smaller panels.
The good composition and pacing continues until about halfway through the comic, when it all goes to pot.
Lemire goes for a really cheap ending to Trillium; really obvious, really self-indulgent (he changes styles at one point and I think photoshops in panels from earlier issues, regardless where the panels are from–he photoshops badly). The ending reveals how the series's pacing problems disabled it too much. The characters have changed too much, too quickly and the ending Lemire goes after needs a lot of thorough work.
Lemire ignores the series's finest qualities for its finish.
Oddly, I liked his art here more than anywhere else.
Two Stars Become One; writer and artist, Jeff Lemire; colorists, José Villarrubia and Lemire; letterer, Carlos M. Mangual; editors, Sara Miller and Mark Doyle; publisher, Vertigo